Abstract
In developed countries, colorectal cancer is the second cause of cancer-related mortality. Chemotherapy is considered a standard treatment for colorectal liver metastases (CLM). Among patients who develop CLM, the assessment of patient response to chemotherapy is often required to determine the need for second-line chemotherapy and eligibility for surgery. However, while FOLFOX-based regimens are typically used for CLM treatment, the identification of responsive patients remains elusive. Computer-aided diagnosis systems may provide insight in the classification of liver metastases identified on diagnostic images. In this paper, we propose a fully automated framework based on deep convolutional neural networks (DCNN) which first differentiates treated and untreated lesions to identify new lesions appearing on CT scans, followed by a fully connected neural networks to predict from untreated lesions in pre-treatment computed tomography (CT) for patients with CLM undergoing chemotherapy, their response to a FOLFOX with Bevacizumab regimen as first-line of treatment. The ground truth for assessment of treatment response was histopathology-determined tumor regression grade. Our DCNN approach trained on 444 lesions from 202 patients achieved accuracies of 91% for differentiating treated and untreated lesions, and 78% for predicting the response to FOLFOX-based chemotherapy regimen. Experimental results showed that our method outperformed traditional machine learning algorithms and may allow for the early detection of non-responsive patients.
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Acknowledgments
We would like to express our appreciation to Imagia Cybernetics for providing the desired hardware for doing our experiments.
Funding
This study was financially supported by MEDTEQ and IVADO grants, as well as the MITACS organization. The clinical and radiological data was provided by Centre de recherche du Centre hospitalier de l’Université de Montréal (CR-CHUM). The Fonds de recherche du Québec en Santé and Fondation de l’association des radiologistes du Québec (FRQ-S and FARQ no. 34939) financially supported An Tang.
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This work was accepted and presented as an abstract for SIIM 2019, in Denver, CO.
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Maaref, A., Romero, F.P., Montagnon, E. et al. Predicting the Response to FOLFOX-Based Chemotherapy Regimen from Untreated Liver Metastases on Baseline CT: a Deep Neural Network Approach. J Digit Imaging 33, 937–945 (2020). https://doi.org/10.1007/s10278-020-00332-2
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DOI: https://doi.org/10.1007/s10278-020-00332-2